text: Share. How to reset your laptop but keep Office. As long as you have a legitimate copy of Microsoft Office, you should be able to reinstall it after you perform a system restore on your laptop or PC.Hereâs how to keep Office when you reset your laptop or PC.n order to restore your laptop and keep Microsoft Office, you will need at least the original product key, also known as an activation code or serial number. Itâs usually 25 digits long.